Pump-piston.



A. A. BOWSER.

.PUMP PISTON.

APPLICATION II-LED JUNE 1, 190a.

Patented Aug. 24, 1909.

- stulling box 18 supported by the cylinder.

' lar 19 which is preferably provided. with ex-- I n 'nvn or ha l-ll l s/iii.

ALLEN A, BOW SEE, OF FORT WfiYNE, INDIAILI9., ASSIGNOE T9 S. BBQWSLER EH, EI YGBRPQRATE D, 013 FORT WAYNE, INDIANA, A. GORPQBATEON (1F ZNDIANA.

PUIlIP-PISTGN.

Specification of Letters Paten Aug'.

arses.

original application filed "I'll. 11, 1907, Serial'No. 367,558. 'fiividecl and this application filed June 1, 1908. Serial tie. 135,885.

To all wlzom it may concern:

Be it known that l, ALLEN Bowsnn, a citizen of the United States, residing ,at Fort \Vayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Pump-Pistons, of which the following is a specification.

This application is a division of my appli-' cation, Serial No. 367,558, filed April 11, 1907, and the present invention relates to improvements in pistons particularly adapt-- ed for use in pumps, and the primary object of the invention is to provide improved, sini ile and durable pistons which will be elleetive and etlicient in operation.

To the attainment oi these ends and the accomplishment of other new and useful objects, as will appear, the invention consists in the features of novelty in the construction combination and arrangernent'of the several parts hereinafter more fully described. and claimed, and shown in the accompanying drawing illustrating an embodiment of the invention, and in. which- .liiguriis a longitudinal view of a cylin- Nor having a piston therein constructed in accordance with the principles of this invert tion and showing the piston in section. Fig. 2 is a detail sectional View on line Z-2 of Fig. 1, looking in the direction of the arrows. Fig. 3 is adetail sectional view on line ii-"3, Fig. 1.

Referring more particularly to the drawing, and in the present cxeinplitication oi the invention, the numeral designates a pump cylinder which is provided with an inlet opening 11 controlled by a valve 113 and an outlet opening 11 on one side oi the piston and an inlet 13 and an outlet opening 13 on the other side ol' the piston. lllovable within the cylinder is a piston head comprising a main body portion l l; having a. recessed tubular projection which is provided with interior screw threads. Situated within the tubular projection 15 so to engage andrest uponthebottoni thereof is an enlarged )or-- tion or shoulder is of a piston rod 17, which latter is adapted to pass througha suitable Surrounding the piston rod is a sleeve 0r colterior screw threads, and. this sleeve or collar is of a SIZQtO enter the tubular PIOJQGtlUIQ 15 so that the threads thereon will engage the threads in the tubular projection, and when the sleeve or collar 1'9 is seated, the extremity thereof will engage and rest upon the upper f.- ie of the enlarged portion. or shoulder iii of he piston rod 1? so as to secure the piston rod to the piston head. i The piston head. 14 is provided with a cir cunilerential flan e or rib extend ng above the upp= face thereof and located at a point intermediate the tubular projection 15 and the periphery of the hotly portion 1%, and supported by this lien or rib 20 is a'rlisk or member 21 which is ol a (jlian'ietcr substantially equal to the diameter of the piston head 14- and surrounos the tubular projection 15. Suitable flexible members 22, .3, such as leather washers or the like are arr n'ged on each side of the member 21, and these flexible Washers or members are preferably of a diameter slightly greater than the diameter of the piston cylinder it), so as to cause the extremities of said dislrs or washers to be slightly deflected as shown.

A cap or member 24 is also provided with a circinnleren ial rib or 25, which is located at a point remote from the periph cry thereof, and. said cap or ,nicniltler is provided with an aperture 26 located prelerably at the diametric center thereof, which is adapted. to receive the tubular proiection 15, so that when placed in position the rib or ilange will rest against the upper face of tie dis-k orwasher 2,3, which latter is supported by the member 'lhc cap or member 24 is provided with a circumferential flange 27 surrounding the aperture 26, and this flange projects for some distance beyond the face of the cap 24 opposite the face from which the flange or rib 25 projects. Yi hen thecap iljis in position, as shown in Fig. l, the upper extremity of the flange 27 will project a short distance beyond the end or" the tubular projection 15 and the cap is held in position or from dis-.1; placement by messes of a suitable jannnut Suitable elastic members 2%, ail springs or thehke are disposedjarennd the respective ribs or flanges 20, 25, so as to stand adjacent the wall ofthe piston cylinder 10,

and these elastic, members tend to hold the ble members into engagement with the wall of the cylinder to form a tight joint.

In order that the invention might be fully understood the details of an embodiment thereof have been thus specifically described but What I claim as new is 1 In combination, apiston head comprising a main body provided with a tubular projecting portion, a support projecting from the body intermediate the periphery thereof and the said tubular portion, a flexible member surrounding the said tubular portion and resting upon the support, said flexible member being of a diameter slightly larger than the diameter of the body portion of the piston, a'piston rod extending into the said tubular ortion, said rod being provided with a shoul er within the tubular portion, means en aging the shoulderof the rod and the tubuIar portion for securing the rod and piston together, and means for preventing the displacement of the flexible member.

2. In combination, a piston head comprising a main body provided with a tubular projecting portion, a support projecting from the body intermediate the peri hery thereof and the said tubular portion, a exible mem ber surrounding the said tubular portion and resting upon the support, said flexible member being of a diameter slightly larger than the diameter of the body portion of the piston, a piston rod extending into said tubular portion, said rod being provided with a shoulder within the tubular portion, means engaging the shoulder of the rod and the tubular portion for securing the rod and piston i together, means for preventing the displacement of the flexible member, and a circumferential elastic member ad acent the periphery of the pistonbeyond the said support.

3. In combination, a piston head eomprising a main body portion provided with a tu bular projecting portion, a circumferential flange on the body remote from the pcri )l1- cry, a flexible member surrounding the i al ular )ortion restin n ion the flan e aur'. iro J h h jecting beyond the periphery of the piston,

said flexible member being of a diameter to' project beyond. the prwiphery ol' the piston, a disk surrounding the, tubular portion, said disk resting upon the flexible i'neinber and being also supported by the flange, a piston rod extending into the tubular portion and having a shoulder within said portion, means engaging the said tubular portion and the shoulder on the rod fbr securingthe piston to the rod, andrmea'ns for securing the said disk against displacement.

4. In combination, a piston head comprising a main body provided with a tubular projecting portion, a circumferential flange on the body emote from the periphery, a flexible member surrounding the tubular portion, resting upon the flange and project- ,ing beyond the periphery of the piston, said flexible member being of a diameter to project beyond the periphery of the piston, a

disk surrounding the tubular portion, said disk resting upon the-flexible member and being also supported by the flange, a piston rod extending into the tubular portion and haying a shoulder within said portion, means engaging the said tubular portion and the shoulder on the rod for securing the piston to the rod, an elastic member surrounding the flange adj aeent the periphery of the piston and to one side of the said flexible member, and means for securing the said disk against displacement.

5. In combination, a piston head comprising a main body provided with a tubular projecting portion, a circumferential flange on the body remote from the periphery, a flexible member surrounding the tubular portion, resting upon the flan 'e and projectmg beyond the periphery of the piston, said flexible member being of a diameter toiproject beyond the periphery of the piston, a disk surrounding the tubular portion, said disk resting upon the flexible member and being also supported by the flange, a piston rod extending into the tu ular portion and having a shoulder within said portion, means engagingthe said tubulanportion and the shoulder on the rod for securing the pi ton to the rod, a retainer for the disk, and means 'operatively related to the piston securing means for holding the said retainer against displacement.

6. In combination, a piston head comprising a main body provlded with a tubular projecting portion, a circumferential flange on the body remote from the periphery thereof, a disk surrounding the tubular portion and resting u on the flange, a member provided with a r epending circumferential ange remote from the periphery thereof and having an aperture adapted to receive the tubular )ortion, the flange of said member being ada )ted to rest upon the disk in proximity to tire flange on the body portion,

flexible members disposed respectively be tween the disk and. fanges, a rod having a head seatedwithin the tubular port on, a

sleeve surrounding the rod and engaging the head means, for secnrnw'the sleeve within 130 member in position.

the tubular portion to prevent displacement of the rod, and means for securing the said 7. In combination, in a pump, a cylinder, a piston movable in the cylinder and cornprising a main body provided with a tubular projecting portion, a circumferential flange on the body remote from the periphery thereof, a disk surrounding the tubular portion and resting u on the flange, a member provided with a. e ending circumferential flange remoteifrom t e periphery thereof and having an aperture adapted to receive the tubular portion, the flange of said member being adapted to rest upon the disk in proximity to the flange on the body portion to form a, eripherel roove, fleyiblemembers disposed respective y between the disk and flange, and projecting beyond the periphery of the disk, 2; piston rod having a head seated Within the tubular portion, a sleeve surrounding the rod and engaging the heed, moms for securing the sleeve Within the tubular portion to prevent displacement of the rod, yielding members Within the roove adapted to engage and hold the exible members in contact with the cylinder, and means for securing the said member in posi. tion.

of May A. D. 1908.

vided with 2; depending circumferential flange remote from the periphery thereof and having an aperture adapted to recerre the tubular 'ortion, the flange of said mem her being a. e ted to rest upon the disk in proximity to t efiengc on the body portion, flexible members disposed respectively between the disk and flanges, a piston rod having is head seated Within the tubular portion, e sleeve surrounding the rod and the head, means for securing the sleeve within the tubular portion to prevent displacement of the rod, and means engaging the sleeve andtheseid member [or holding the letter in position. J

In testimony whereof I have signed my name to this specification, in the presence e? en aging two subscribing witnesses, on this 27th day ALLEN A. BOWSER. Witnesses:

J. H. JOCHUM, J12, M. W. CAN WnLL 

